You can see a listing from the USPTO of Non-USPTO solicitations that may resemble official USPTO communications here: http://www.uspto.gov/trademarks/solicitation_warnings.jsp
One interesting solicitation I have been receiving recently via email is the following:
- Trademark Owner's Digest
The solicitation from Trademark Owner's Digest looks like this:
It begins with "Congratulations! Your Trademark has been registered." This immediately sets alarm bells ringing in my head, as coming from new York, I am naturally suspicious of being congratulated by anyone for anything. Of course, it is entirely possible that Trademark Owner's Digest provides a very valuable service in exchange for the $980.00.
Trademark owners should be careful in responding to ANY solicitations pertaining to their trademark applications or registrations. Know what you are getting in return before you send your money!